Joint Study on Non-Accelerator Physics [LVD+LMD]

1.Gran Sasso地下实验室的大体积探测器(LVD)是一种多用途探测器，由大体积液体闪烁体和紧凑的三维几何形状的有限流光管交错组成。LVD中微子天文台的一个主要目的是寻找恒星坍塌。该探测器具有模块化结构，由5个塔中的190个模块组成。每个模块都有8个闪烁计数器，周围环绕着一个L形状的跟踪系统。总质量为1840吨闪烁体，尺寸为40米*12米*13米。目前，第一座塔正在采集数据，第二座和第三座正在建设中。第一座塔(368吨)于1992年6月启动。这一质量的液体闪烁体使LVD第一座塔成为世界上最大的超新星中微子天文台之一，也是最大的基于液体闪烁体的超新星中微子天文台。LVD小组展示了LVD在研究低能中微子和寻找恒星坍塌信号方面的能力。第一批结果是通过对EAS-TOP(在大萨索表面)和LVD(地下深处)探测器的联合测量得出的，该探测器在研究超高能宇宙线及其相互作用时作为一个组合望远镜运行。作为例子，研究了不同类型的事件及其在不同高能和天体物理中的意义。研制了一种用于超慢质量粒子探测的热释光[Tl]片及其读出系统。从低能离子实验的结果来看，TL-Sheet对慢速(β&lt；10^&lt；-3&gt；)离子具有很高的效率。40米^2的TL-Sheet堆栈在勃朗峰隧道放置了两年。对40×8m^2的X射线片进行了分析。从X射线片分析中发现了3个候选菌株。他们的TL-Sheet已经被读出并搜索是否有缓慢的肠道单极子。

1. The Large Volume Detector (LVD) in the Gran Sasso underground Laboratory is a multipurpose detector consisting of a large volume of liquid scintillator interleaved with limited streamer tubes in a compact 3-dimensional geometry. A major purpose of the LVD neutrino observatory is to search for stellar collapses. The detector has a modular structure composed of 190 modules arranged in 5 towers. Each modules has 8 scintillation counters surrounded by an L-shaped tracking system. The total mass is 1840 tons of scintillator and the dimensions are 40m*12m*13m. Presently the first tower is taking data and the second and third are under construction. The first tower (368 tons) was turned on in June 1992. This mass of liquid scintillators makes the first LVD tower one of the largest supernova neutrino observatories in the world and the largest one based on liquid scintillator.The LVD group presents the power of LVD to study lowenergy neutrinos and a search for stellar collapse signals. The first results were obtained from the combined measurements of the EAS-TOP (at the surface of Gran Sasso) and LVD (deep underground) detectors operating as a combined telescope in the study of UHE cosmic rays and their interactions. As examples, different classes of events and their significance in different high-energy and astrophysical were studied.2. A thermoluminescent [TL] sheet and its readout system have been developed for the detection of supper-slow massive particles. From the results of lower energy ion experiments the TL-sheet has an efficiency for slow velocity (beta<10^<-3>) ions. The TL-sheet stacks of the 40m^2 were set at the Mont Blanc tunnel for two years. The X-ray films of 40*8m^2 were analyzed. Three candidated were found from X-ray film analyzes. Their TL-sheets have been read out and searched for slow GUT monopoles or not.